Empty online lobbies are a frustrating element of online multiplayer for any game. Table Tennis Touch is a paid game with a comprehensive single player mode so it doesn't have the huge volume of players required to keep the lobbies consistently populated. There are also no bots in multiplayer (maybe there should be?) - it simply needs more players to be online all at the same time. 🤔
If you're keen on organising matches with other players whether over iOS or Play Games, then please check our new forums and let's see if we can get some matches organised!